Is Q92.8 a billable ICD-10-CM code?

Yes. Q92.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q92.8 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).

What cannot be coded together with Q92.8?

Q92.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q92.8 (Q92) and apply to it just the same.

Q92.8

Q92.8 — Other specified trisomies and partial trisomies of autosomes

Billable / specific codeICD-10-CMPOA exempt

Q92.8 is a billable, specific ICD-10-CM code for other specified trisomies and partial trisomies of autosomes. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Duplications identified by fluorescence in situ hybridization (FISH)
Duplications identified by in situ hybridization (ISH)
Duplications seen only at prometaphase

Excludes1 inherited from the categories above Q92.8

These are not written on Q92.8, but they bind it: a note on a category applies to every code beneath it. Billing Q92.8 with anything listed here is a denial.

Written on Q92 — Other trisomies and partial trisomies of the autosomes, not elsewhere classified

trisomies of chromosomes 13, 18, 21 (Q90-Q91)

Risk adjustment

Q92.8 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How Q92.8 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q92.8.

Cat›eye syndrome
Syndrome›cat eye
Trisomy›20
Trisomy›22
Trisomy›chromosome specified NEC
Trisomy›specified NEC
Duplication, duplex›chromosome NEC›seen only at prometaphase
Syndrome›trisomy›20(q)(p)
Syndrome›trisomy›22
Trisomy›chromosome specified NEC›specified NEC
Trisomy›whole chromosome›specified NEC
Accessory›chromosome›with complex rearrangements NEC›seen only at prometaphase

Code history

Q92.8 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share Q92. If Q92.8 is not quite right, the correct code is usually one of these.

Questions about Q92.8

Is Q92.8 a billable ICD-10-CM code?: Yes. Q92.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q92.8 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).
What cannot be coded together with Q92.8?: Q92.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q92.8 (Q92) and apply to it just the same.